Because it seems like you guys think the cops operate under a hidden agenda, and if a community feels like they are being oppressed I would say it has alot less to do with what the police are doing and more with how they are living their lives. Contrary to popular belief the cops have no alternative motive or organized effort to oppress the communities to whom they serve. The problem lays within the communities not the police.

Yes, there are definitely problem in those communities, those people DO think the police are out to get them, and maybe they are for good reasons. And as attractive as it sound to either deport those people to the country of their ancestors or wall off their communities and let them fend for themselves, neither will likely happen so the police there need to find some other way to get things under control.